Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f50ec01b384b6e…

MALICIOUS

PDF

84.2 KB Created: 2021-09-02 02:06:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 392f89767392ce1ae308b5989db2b821 SHA-1: 0584fa7611c8f77f69f79acffa0fdd6f77e2cb48 SHA-256: 65f50ec01b384b6e011278d5712f16772217768011e09f8bb887423f47a3f173
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to websites hosted on compromised CMS platforms, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites or download further payloads. No scripts were extracted, but the structure and URL findings are sufficient for a high-confidence assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://paroissedementon.fr/upload/files/61457664969.pdf In PDF document text
    • https://xn--hjrnskadeakademien-mtb.se/userfiles/file/kipigiropifofiwezoren.pdfIn PDF document text
    • https://rainbowfurnitures.com/files/files/3250061914.pdfIn PDF document text
    • http://blesk-stroy.ru/userfiles/files/34531309154.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/3fa3347790db10f5919c1370f7cba6eb/92182938670.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160983d54acd1f---29447542995.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/mewafapezikokesijaf.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16085ab2f44450---luxajenokejakirodod.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/91355061528.pdfIn PDF document text
    • http://air-ned.com/uploads/files/gobifiwifakatep.pdfIn PDF document text
    • https://jewfri.kr/files/image/files/66879890116.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c581fad0ebd---74624283752.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609aea0d18575---jikiloxateteniru.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/8508951952.pdfIn PDF document text
    • http://bukharaalpharetta.com/sites/default/files/file/8305241533.pdfIn PDF document text
    • http://urjabatteries.in/userfiles/file/92198492825.pdfIn PDF document text
    • http://heyumpnd.com/userfiles/file///xaxenibo.pdfIn PDF document text
    • http://stevis.cz/files/file/xesopogidijemafumitibe.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/094636cce742d88391847763a886ab8f/83601077657.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/d8ccf16f7d2d0cb2bd714525dc7af193/84279931839.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/kofibujunawowas.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/35aa8aa2065915d0ff3b7a578c191f38/57118552052.pdfIn PDF document text
    • http://thetestmag.com/userfiles/files/bajorevuviropevebizimupo.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/vjieirardaed57q9qjja062cqi/94163590068.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160948db819154---tejuxabebitake.pdfIn PDF document text
    • https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/70a8483b76c38c3d3f716034949beb27/siserove.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=lil+yachty+migosPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE259 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 19412 bytes
SHA-256: d627e87841b31b94fe0298be1864c3b807a1175d4f269120651a6f1cc3623df5
font_02_sfnt_off00012bd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BD4 10412 bytes
SHA-256: 4776789ed5e9addf0806f0be019c8a5876a8c75e7cdd79f436b120eef2ad47eb

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